Metallic packing for piston-rods



(No Model.)

N. G. BASSETT.

METALLIC PACKING FOR PISTON RODS. 7 No 271,300. Patented 121,111.30, 1883.

u. Pnens HMO-mm, mm a: V

BASSETT, ot' the city UNITED STATES PATENT OFFICE,

NORMAN (l. BASSEIT, OF PHILADELPHIA, PENNSYLVANIA.

METALLIC PACKING FOR PISTON=RODS.

SPECIFICATION formingpartof Letters Patent No. 271,300, dated January 30, 1883.

Application filed November 16, 1882. (N0 model.)

To all whom it may concern Be it known that I, NORMAN GHAUNOEY and county of Philadelphia, of the State of Pennsylvania, have invented a new and useful Improvement in Metallic Packings for Piston-Rods; and 1 do hereby declare the same to be described in the following specification and represented in the accompanying drawings, of which Figure l is a vertical section of parts of a piston-rod and steam-engine cylinder with my improved packing applied thereto. Fig.2 is a top view of one ring of the inner series of metallic rings. Fig. 3 is a top view of one ring of the outer series of metallic rings.

The nature of my invention is defined in the claims hereinafter presented.

In Fig. 1 the pistoirrod is shown at A and the cylinder-head at B, the latter having within it a cylindrical chamber, a, to receive the parts or rings of the packing. Leading from the bottom of such chamber to the bottom of the head, and concentric with the piston-rod, is a cylindrical passage, 1), having a diameter a little greater than that of the said rod, and there is screwed into the chamber, at its mouth, a cap or gland, 0, having in its central part a cylindrical passage, 0, whose diameter is a little larger than that of the rod. Within the said chamber I use in the formation of the packing two series of fiat rings, each one of the inner series being marked D, while each one of the outer series is marked E. Each ring E has made down' within it, concentrically, a cylindrical chamber, d, having a depth equal to or a trifle greater than that of the ring D, placed in it, such chamber also having a diameter somewhat greater than that of the said ring. The rings E rest upon one another, or are arranged in manner as shown within the chamber a, each of such rings having within its chamber one of the rings D. The lowest ring D, and perhaps one or more others of the series to which it belongs, 1 provide with holes 0, leading upward through it from the passage 1) and terminating in an annular groove, 1'', made'concentrically in the top of the ring, and equal or about equal in secthe gland O, and in contact with both, is an elastic or yielding ring, G, of asbestos or vulcanized indie-rubber or other suitable material.

In and around each of the wearing-surfaces 0f the several rings D and E, I, usually have one or more grooves, h, for water to collect in, and seal the joint between such surface and that next adjacent to it. 7

From the above it will be seen that the rings D, while serving in part as a packing to. the piston-rod, can move laterally with it in the rings E, held in place by the rings F G" and the gland C; also, that the pressure of the steam exerted through the passage l2 against the lower surface of the lowermost ring D will be counterbalanced by that of the steam that may pass through the passage einto the groove f,- also, that the upward pressure of such steam on the ring E covering such groove will be resisted by the elastic ring G, which will also allow the ring D to move laterally when litting closely to the rings E.

A piston-rod packing can thus be made which will operate to excellent advantage and be very durable and sutliciently stearn tight and yielding relatively to the rod.

I do not claim a packing composed of a series of internal rings and a series of charmbered rings constructed and arranged as represented in either of the United States Patents Nos. 222,805 or 228,200; Nor do I claim an elastic annulus constructed and arranged with packing-rings, as represented in the latter of 85 said patents, my invention involving, in connection with such an annulus and two series of rings, as hereinbefore described, the conical ring F, whereby when the gland is screwed down the elastic annulus is pressed outward as well as compressed.

I claim l. The combination of the conical ring F and the yielding or elastic ring G, arranged in the chamber a, with the gland 0 thereof, their series ot'internal rings, D, having to the ID and with the two series of rings D E, conlowermost of them (the said rings D) the passtrneted, arranged, and adapted in manner sage e and annular groovef, arranged in it, as and for use with a piston-rod, A, substantially explained. as set forth 2. The gland G and the chamber a, provided NORMAN OHAUNCEY BASSETT' with the passages c and 1), arranged as ex- Witnesses: plained, in combination with the rings F and R. H. EDDY, G and the series of chambered rings E and l E. B. PRATT. 

